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Homework Help: THEORETICAL Strengths Of Materials.

  1. May 19, 2010 #1
    1. The problem statement, all variables and given/known data

    1) Why, in general, do brittle materials not acheive their theoretical tensile strengths?

    2) Why, in general, do ductile materials not acheive their theoretical shear strengths?

    2. Relevant equations

    None needed. Wordy answer.

    3. The attempt at a solution

    Something to do with the stress intensity factor / defects for brittle materials??

  2. jcsd
  3. May 19, 2010 #2


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    Science Advisor
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    Gold Member

    You're going in the right direction for the brittle part. What's your answer for ductile materials? It might be useful to think about how the theoretical strength is determined; that is, how the material is envisioned to fail when the theoretical strength is calculated.
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